Geronimo Gaston Poblete (born 2 January 1993) is an Argentine professional footballer who plays as a defensive midfielder for FC Metz.

Poblete started his senior career in 2011 with Argentine Primera Division side Colon, he was an unused substitute four times during the 2011–12 season. He made his professional debut on 16 February 2014 in a game against Argentinos Juniors.

On 4 July 2017, after one hundred and seven appearances for Colon, Poblete departed to France to join Ligue 1 club Metz. He joined on a free transfer and signed a four-year contract. Poblete's Ligue 1 debut came on 5 August versus Guingamp, he played the full match in a 1–3 defeat. On 11 August 2018, San Lorenzo loaned Poblete. 22 appearances followed in 2018–19. Poblete left San Lorenzo on 30 June 2019, but returned on a fresh loan deal on 21 July.